Trusted Sources
Google already decided which domains it trusts for entity facts. Here they are.

Google Knowledge Graph: Entity isReference domains

Dataset: 62,202 isReference domains | entities

Proprietary analysis of Google's entity validation patterns across the Knowledge Graph.

The Google leak in May 2024 confirmed that Google explicitly associates people with their profile pages (isReference) and articles they have written (isAuthor).

⚠️ You Can't Use Just ANY Domain!

Out of 1,738,093 domains we monitor, only 62,202 qualify as isReference domains.

3.65%

Only 3.65% of domains earn isReference status from Google. Domain selection is critical.

Key concepts:

Wikipedia is NOT Required (or even your best bet)

Wikipedia: 6 million entities
Kalicube Pro: 71 million entities
Knowledge Graph: 50 billion entities

0.012%

Wikipedia covers only 0.012% of the Knowledge Graph. If your entity isn't in that 0.012%, you need to build a Knowledge Panel with ~30 isReference url instead.

📊 Kalicube's Entity Validation Dataset

1,738,093
Domains Checked Regularly
62,202
isReference Domains
3.58% qualify
23,295,240
URLs Monitored
73,832,938
Entities Tracked

💡 Even Small Niche Domains Have isReference Authority

Examples from our dataset (December 2025):

kalicube.com 21 entities
searchengineland.com 11 entities
jasonbarnard.com 86 entities
searchenginejournal.com 270 entities
entrepreneur.com 1,292 entities
forbes.com 2,823 entities

Your niche-specific domains may have similar authority in your category.

Top 100 isReference Domains for All Entity Types

Rank Domain Entity Count
1 wikipedia.org 494,942
2 linkedin.com 149,388
3 instagram.com 131,884
4 x.com 71,107
5 facebook.com 63,958
6 legacy.com 60,395
7 namu.wiki 35,941
8 google.com 33,295
9 youtube.com 30,577
10 britannica.com 25,144
11 crunchbase.com 24,378
12 dictionary.com 24,374
13 reddit.com 19,369
14 amazon.com 18,759
15 fandom.com 16,973
16 letterboxd.com 12,857
17 microsoft.com 11,168
18 wiktionary.org 10,299
19 apple.com 9,571
20 rottentomatoes.com 9,208
21 justwatch.com 7,526
22 imdb.com 7,454
23 yahoo.com 6,696
24 tiktok.com 6,597
25 cambridge.org 6,272
26 shopee.co.id 6,044
27 indeed.com 5,944
28 espn.com 5,928
29 quora.com 5,416
30 hbomax.com 5,306
31 genius.com 4,951
32 epicgames.com 4,864
33 shopee.ph 4,537
34 billboard.com 4,529
35 spotify.com 4,349
36 vocabulary.com 4,277
37 time.is 4,266
38 wikiwand.com 4,135
39 nhl.com 4,098
40 forbes.com 4,042
41 github.com 3,984
42 history.com 3,959
43 bing.com 3,933
44 dictionary.net 3,849
45 thesaurus.com 3,635
46 bbc.co.uk 3,614
47 pornhub.com 3,594
48 deel.com 3,562
49 bloomberg.com 3,566
50 bbc.com 3,550
51 nfl.com 3,492
52 loc.gov 3,488
53 independent.co.uk 3,388
54 google.co.il 3,359
55 temu.com 3,310
56 nintendo.com 3,299
57 inc.com 3,194
58 gov.uk 3,032
59 merriam-webster.com 2,998
60 search.google 2,929
61 eo-paris.fr 2,919
62 nba.com 2,884
63 soundcloud.com 2,869
64 trustpilot.com 2,838
65 fifa.com 2,781
66 goodreads.com 2,756
67 mubi.com 2,713
68 radiofrance.fr 2,710
69 uk.com 2,705
70 entrepreneur.com 2,654
71 nih.gov 2,648
72 amazon.co.uk 2,618
73 wordpress.org 2,562
74 theguardian.com 2,565
75 delta.com 2,530
76 researchgate.net 2,515
77 steampowered.com 2,506
78 shopee.sg 2,501
79 house.gov 2,484
80 google.com.br 2,481
81 ms-ci.co.il 2,468
82 reuters.com 2,462
83 netflix.com 2,444
84 usnews.com 2,426
85 stackoverflow.com 2,342
86 aliexpress.com 2,340
87 stanford.edu 2,314
88 zhihu.com 2,306
89 playstation.com 2,283
90 ebay.com 2,264
91 the-independent.com 2,261
92 grammy.com 2,245
93 xhamster.com 2,241
94 nasa.gov 2,210
95 pinterest.com 2,211
96 one-line.com 2,193
97 gog.com 2,192
98 upenn.edu 2,189
99 watch.plex.tv 2,175
100 public.com 2,164
101+ 62,102 additional niche-specific domains in full dataset covering 72,303,416 additional entities

Why This Data Matters

Google validates entity information through patterns of corroborating mentions across trusted domains. This list shows where Google recognizes all entity types - but here's the catch: entity authority is extremely niche-specific.

Entity Validation at Scale

Google's Knowledge Graph requires consistent entity recognition across validated domains.

  • Only 3.65% of domains (62202 out of 1738093) qualify as isReference
  • Brands typically need ~30 entity-validated url for a stable Knowledge Panel
  • Each niche has unique entity authority patterns
  • Generic "authority lists" miss 95%+ of niche-specific opportunities

⚠️ This Free List is Intentionally Limited

The top 100 domains shown above are dominated by massive generalist sites. For 99% of brands, the real opportunities lie in the niche-specific domains that only appear in our full platform dataset.

Recommended Reading:

🔐 Find YOUR Niche-Specific isReference Domains

We monitor 23M+ URLs across 1.7M domains to identify the exclusive 3.65% that qualify as isReference domains for 72M+ entities. The Kalicube Pro platform maps your competitive landscape and identifies your niche-specific opportunities in 15 minutes.

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Knowledge Panel Instruction Manual

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